Modular Display Version 1.0

I wanted to create a display that is totally customizable. I personally haven't done a show of my own but have used an early version of this to display some small prints for sale as a salon. I like the way it worked and tweaked it to what you see now.I would really like any feedback to make it better. This could be made as wide as you want and so far as in the pictures I have only tested it 3 high as seen in the pictures being very stable. Each bay on the bottom is 210mm x 75mm with the divider slot being 5mm wide with the bay being 75mm deep.Each bay on the upper display is 95mm x 75mm with the divider slot 5mm wide while the back being 75mm tall and the front 40mm. There are slots that you can either put blanks in the slots along the front and sides or use the wide sign insert. I have made sign posts that can be inserted into the back slots to attach signage. Please feel free to reach out and feedback is definitely appreciated.